Tracker-bar.



1 No. 873,545? PATENTBD DEC. 10, 1907.

' J. HATTEM'ER.

2 8HBBTS-BHEET 1.

Q I animator. '5 AsKmsXXQVQ q, mew

in as:

No, 873,545. PATENTBD DEC. 10, 1907.

J. 'HATTEMER.

TRACKER BAR. APPLICATION FILED MAY 14, 1907.

2 SHEETS-SHEET 2.

r I I 'odoooaoo oeooooaces/JJQoooooaooaooo 6 vwenfoz ESwsXm5 HQX/wmw w;M use: I Q

attoungd UNITED strA rns PATENT OFFICE.

ilL'S'llN ll.\'llL1. ll-Ili. l ll-1ST hl lW YORK, NEW JERSEY, ASSIGNORTO HARDMAN, PliCli & (-OllllXY. U1 NEW YORK; N. Y, A (ORPORATION Ol NEWYORK.

TRACKER-BAR.

Specification of Letters Patent.

Patented Dec. 10, 1907.

Application filed May 14. 1907 Serial No. 373.610.

To all 'uvnmv it may concern:

Be it known that l, Jus'r'us llA'lTEMER, ucihzcn ol the" United States,residing at l'l'c.-ii New York, in the count of Hudson lolloning to he:1- full, clear, and exact description oil' the invention, such as willenable others skilled in the art to which it eppertains to make and usethe same.

This invention. relates to treckenhers, and. has for an object toprovide a tracker bar for a sol [playinginstrumentor foreninstrumentplayer adopted to use music sheets arranged for varying compasses.

it is well known that the piano player ordinarily in use is adapted foruse of music shoots with a compass of sixty-live actions, such actionsapplying to both white and block keys upon the piano. fit is also fur-(her well known that there a. large qumn it of music which cannot heproperl v rendered within the compass of sixty five notions and toprovide for such music, music sheets are now employed adopted to actuateeighty-right actions, nipresontinn white and block keys.

it is :in object of this iiivention to provide a. single trucker baradapted by a simple shilling thereof to present. either six live oreighty-eight holes or openings to operate in association with the musicsheets just mentioned.

A further object of the invention is to provide in a tracker her a.rotetnbl movable member having it row or series oi sixty-live openingsmoulding in :1. line in parallelism with the nxis and another row orseries of l, Q-nywightopenings extending in parallelism with both theaxis of the other row and with tubes connecting such openings with theseveral actions.

A further object of the invention is to provide :1- trncker her of thekind described and with means for closing one series of openings Whilethe other series is being;- emiloycd and wnth a, further meansconnecting both sets of openings with the actions.

With those and other objects in View, the invention comprises cerminnovel constructions, combinations and arrangements ol parts, as wi l behcrrinnl'lrr fully described rind claimed.

in the do; wingsz- Figure l is o View vertical, transverse section ofthe tracker bur :lormmg the sul 1ect-1natter of this application,together with associated parts shown couven tionally. Fig. 2 is afragmentary view in front elevation of the tracker her and associntedports. Fig. 3 is a detail view of modified form for connectingthetracker bar with the actions.

Like characters of reference designate corresponding; parts throughoutthe several views.

The improved tracker her is mounted hetwecn the usual and ordinarycheek' lates 10 disposed either within a self-p eying piano or within apiano player and between which is journeled a, take-up spool or roller.11 and removebly journeled rewind spool 12 carrying the music sheet 13.Between the spools H and 1 mounted a tracker bar consisting of a.segment of pipe 14, such segment being in any approved proportion l' theentire pipe and here shown as approxin'lately two-thirds The pipeisjournaled in any approved manner as by means of o disk or end plate15, and a stud 16 extending therefrom into the cheek plates 10.

The pipe or tracker 1m 12 is provided with :1. row or series of openlugs 65 extending in parallelism with the axis of the tracker bin andwith short tubes or nipples 17 in communication catch with one 01? theholes 65 and. extending within the pipe. As the holes (55 are arrangedvery close together it is tound desirable to stagger the extremities olthe nipples 1,7 to permit the flexible tubes 18 lo be easily andproperly -placed thereon. A second row of holes or openings 88 is provided in parallelism with the axis of" the tracker her, and n ith therow of holes 65 and nipples ll) employed upon which are placed theflexible tubes 20. The flexible tubes 18 and 20engage at their oppositeends nipples 21 and 22 properly positionedv in the action box 23f." itwill hc undcrstood that the pipes 20 eorr' ndinr: with the pipes 18communicate wi the some action, that is, the pipe 24) representingmiddle upon the piano is in communication with the some action as thepipe 1% representing middle (1. As the longitudinal extent of theopenings is practically equal to the longitudinal extent of the openings65 it is obvious that the openings 88 are nearer together than the 0minus 65 and that the corresponding flexilne tnhcs cxtei'iding from saidopenings while coincident at the middle of the tracker bar will vary aconsiderable distance toward pivoted as at 26 above the tracker bar andprovided with a resilient or elastic member 27, preferably of leatherpositioned to bear upon the tracker bar and to cover simultaneously allof the holes 88 when the holes 65 are in operative position. Below thetracker bar a similar late or board 28 is pivoted at 29, and a similarelastic member 30 p0- sitioned to cover all of the holes 65 when thetracker bar is in the position shownin Fig. l in dotted lines, with theholes 88 in operative position.

Means for clamping the elastic members 27 and 30 upon the tra ker bar isprovided as the spring 31 extending between and having its opposite endssecured to the plates 25 and 28 it hereby one of the rows of holes 65 or88 are always covered by one of the elastic members 27 or'30.

Instead of employing two nipples as 21 and 22 for connecting the tubes18 and 20 with the action a single Y connection 32 as shown in Fig. 3,may be provided whereby the tubes 20 and 18 connect directly to thespaced ends of the Y-connection, the single end being in communicationwith the action. i

It will thus be seen that when the tracker bar is in the position shownin Fi l-in full lines the holes 65 are in osition tion in connectionWitht e music sheet 13,

- while the holes 88 are out of o eration and covered by the elastic,mem er- 27. By

ii opera ples secured upon the inner surface of t e segment and incommunication .with the openings of the several series, flexible tubesextending from the nipples, the tubes of corresponding openings of theseveral series communicating with each. other, covering members engagingthe exterior surface. of the cyhnder, and means to move the. cylinder tobrmg one of the covering members into engagement with one of theseriosof open- 2. A tracker bar composed of a segment of a hollow cylinderprovided with a plurality of series of openings extending in parallelismwiththe axis of the cylinder, a plurality of nipples rigidly secured tothe interlor surface of the cy indcr m series corresponding to andcommunicating with the openings, flexible tubes secured to the nip ples,and extending through the open side of the segment, means to rotate thesegment upon its axis, and covering members bearing yieldingly upon theexterior surface ol the segment, and ositioned each to cover one of theseries 0 openings when the segment is moved.

In testimony whereof I aflix my signature in presence of two Witnesses.

J USTUS HATTEB IER.

Witnesses HARRY O. ADAMS, E. A. Seminar.

